Finding the Fourth Proportional to 92.82, 139.26 and 38.72

Step by Step Solution

1. Step 1: Write the proportion equation
   92.82 : 139.26 = 38.72 : x
2. Step 2: Convert to fraction form
   92.82/139.26 = 38.72/x
3. Step 3: Cross multiply
   92.82x = 139.26 × 38.72
4. Step 4: Simplify right side
   92.82x = 5,392.15
5. Step 5: Solve for x
   x = 5,392.15/92.82
6. Step 6: Final answer
   x = 58.09